Patella Fracture

This radiograph of patellas shows a normal left patella and a healing fracture of the right patella.  This x-ray was taken with the patient lying on his back and directing the beam over his bent knees.

Notice that the facet of the patella that articulates with the lateral condyle of the femur is larger than the facet articulating with the medial condyle. 

image courtesy of Radiopaedia.org

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